43-7-1. Duration of enjoyment of estates in real property. Estates in real property, in respect to the duration of their enjoyment are:
(1) Estates of inheritance or perpetual estates;
(2) Estates for life;
(3) Estates for years; or
(4) Estates at will.Source: CivC 1877, § 218; CL 1887, § 2734; RCivC 1903, § 241; RC 1919, § 311; SDC 1939, § 51.0402.